2011111012121 has 4 divisors (see below), whose sum is σ = 2020642344144. Its totient is φ = 2001579680100.

The previous prime is 2011111012103. The next prime is 2011111012181. The reversal of 2011111012121 is 1212101111102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011111012121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011111012096 and 2011111012105.

It is not an unprimeable number, because it can be changed into a prime (2011111012181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4765665695 + ... + 4765666116.

It is an arithmetic number, because the mean of its divisors is an integer number (505160586036).

Almost surely, 2^{2011111012121} is an apocalyptic number.

It is an amenable number.

2011111012121 is a deficient number, since it is larger than the sum of its proper divisors (9531332023).

2011111012121 is an equidigital number, since it uses as much as digits as its factorization.

2011111012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9531332022.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 2011111012121 its reverse (1212101111102), we get a palindrome (3223212123223).

The spelling of 2011111012121 in words is "two trillion, eleven billion, one hundred eleven million, twelve thousand, one hundred twenty-one".